/*!
 * Crypto-JS v1.1.0
 * http://code.google.com/p/crypto-js/
 * Copyright (c) 2009, Jeff Mott. All rights reserved.
 * http://code.google.com/p/crypto-js/wiki/License
 */

const Register = function(Crypto) {
	// Shortcut
	var util = Crypto.util;

	Crypto.HMAC = function (hasher, message, key, options) {

		// Allow arbitrary length keys
		key = key.length > hasher._blocksize * 4 ?
			hasher(key, { asBytes: true }) :
			util.stringToBytes(key);

		// XOR keys with pad constants
		var okey = key,
			ikey = key.slice(0);
		for (var i = 0; i < hasher._blocksize * 4; i++) {
			okey[i] ^= 0x5C;
			ikey[i] ^= 0x36;
		}

		var hmacbytes = hasher(util.bytesToString(okey) +
							hasher(util.bytesToString(ikey) + message, { asString: true }),
							{ asBytes: true });
		return options && options.asBytes ? hmacbytes :
			options && options.asString ? util.bytesToString(hmacbytes) :
			util.bytesToHex(hmacbytes);
	};

	return Crypto
}


module.exports = Register